Fix ubsan failures (pass NULL to memcpy)

2016-10-12 20:54:42 -07:00
parent 5d919e7ac3
commit 3b9cdf9220
2 changed files with 7 additions and 3 deletions
@@ -1402,7 +1402,9 @@ ZSTD_DDict* ZSTD_createDDict_advanced(const void* dict, size_t dictSize, ZSTD_cu
            return NULL;
        }

-        memcpy(dictContent, dict, dictSize);
+        if (dictSize) {
+            memcpy(dictContent, dict, dictSize);
+        }
        {   size_t const errorCode = ZSTD_decompressBegin_usingDict(dctx, dictContent, dictSize);
            if (ZSTD_isError(errorCode)) {
                ZSTD_free(dictContent, customMem);